ASTM International

Standard Test Method for On-Line pH Measurement of Water of Low Conductivity
 N D5128

Annotation

This test method covers the precise on-line determination of pH in water samples of conductivity lower than 100 S/cm (see Table 1 and Table 2) over the pH range of 3 to 11 (see Fig. 1), under field operating conditions. pH measurements of water of low conductivity are problematic for conventional pH electrodes, methods, and related measurement apparatus.

This test method includes the procedures and equipment required for the continuous pH measurement of low conductivity water sample streams including the requirements for the control of sample stream pressure, flow rate, and temperature. For off-line pH measurements in low conductivity samples, refer to Test Method D5464.

The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Автоматический перевод:

Метод Стандартной пробы для Онлайнового Измерения pH Воды Низкой Проводимости

Этот метод испытаний покрывает точное онлайновое определение pH в пробах воды проводимости ниже, чем 100 S/cm (см. Таблицу 1 и Таблицу 2) по диапазону pH 3 - 11 (см. Рис. 1), под полевыми условиями работы. измерения pH воды низкой проводимости проблематичны для стандартных электродов pH, методов и связанного аппарата измерения.